500% import duty is way too much.

80% is enough.

High one-time taxes are not a good idea.

Rather dilute them into 8 seperate yearly taxes.

A curb weight tax of 40% sounds reasonable. A fuel inefficiency penalty of 25% also sounds good.

At least a 15% tax on anything shorter than 1 meter being invisible from the cabin is also very warranted.

That's 3 of 8.

Additionally, whenever a truck is involved in a crash treat it disfavourably. That should drive up insurance premiums.

So with my 80/80 tax mix they'd actually pay 880% tax in the first 10 years of ownership with 3 basic taxes.